<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容"
          v-model="queryInfo.query" clearable
          @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search"
            @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="8">
          <el-button type="primary" @click="goAddpage">添加商品</el-button>
          <el-button type="primary" @click="exportList">导出</el-button>
          <el-button type="primary" v-print="'#outTable'">打印</el-button>
        </el-col>
      </el-row>

      <!-- table表格区域 -->
      <el-table
        id="outTable"
        :data="goodslist"
        border
        row-key="id"
        stripe>
        <el-table-column
        class-name="cannotDrag"
        type="index"
        label=""
        fixed></el-table-column>
        <el-table-column
          v-for="(item, index) in col"
          :key="`col_${index}`"
          :prop="dropCol[index].prop"
          :width="dropCol[index].width"
          :label="item.label">
        </el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="140" class-name="cannotDrag">
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="130" class-name="cannotDrag">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
            <el-button type="danger" icon="el-icon-delete"
            size="mini"
            @click="removeById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[5, 10, 15, 20]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total"
      background>
      </el-pagination>

    </el-card>

  </div>
</template>

<script>
import FileSaver from 'file-saver'
import XLSX from 'xlsx'
import Sortable from 'sortablejs'

export default {
  data() {
    return {
      // 表格渲染时每一列对应的属性
      col: [
        {
          label: '商品名称',
          prop: 'goods_name'
        },
        {
          label: '商品价格(元)',
          prop: 'goods_price'
        },
        {
          label: '商品重量',
          prop: 'goods_weight'
        }
      ],
      // 表头显示
      dropCol: [
        {
          label: '商品名称',
          prop: 'goods_name'
        },
        {
          label: '商品价格(元)',
          prop: 'goods_price',
          width: '95px'
        },
        {
          label: '商品重量',
          prop: 'goods_weight',
          width: '70px'
        }
      ],
      // dropCol: this.col,
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0

    }
  },
  mounted() {
    this.getGoodsList()
    this.columnDrop()
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })

      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败！')
      }

      // this.$message.success('获取商品列表成功！')
      this.goodslist = res.data.goods
      this.total = res.data.total
    },
    // 获取当前每条显示条数
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 获取当前页码
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 删除当前行
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除！')
      }

      const { data: res } = await this.$http.delete(`goods/${id}`)

      if (res.meta.status !== 200) {
        return this.$message.error('删除失败！')
      }
      this.$message.success('删除成功！')
      this.getGoodsList()
    },
    // 添加商品
    goAddpage() {
      this.$router.push('/goods/add')
    },
    // 导出商品列表
    exportList() {
      this.loading = true
      var wb = XLSX.utils.table_to_book(document.querySelector('#outTable'), { raw: true })
      console.log(this.goodslist, '11111111')
      var wbout = XLSX.write(wb, {
        bookType: 'xlsx',
        bookSST: true,
        type: 'array'
      })
      try {
        FileSaver.saveAs(
          new Blob([wbout], { type: 'application/octet-stream' }),
          '门店佣金流水-数据导出.xlsx'
        )
        this.loading = false
      } catch (e) {
        if (typeof console !== 'undefined') console.log(e, wbout)
        this.loading = false
      }
      return wbout
    },
    // 列拖拽
    columnDrop() {
      const wrapperTr = document.querySelector('.el-table__header-wrapper tr')
      this.sortable = Sortable.create(wrapperTr, {
        animation: 180,
        delay: 0,
        filter: '.cannotDrag',
        onEnd: evt => {
          // console.log(evt)
          // 注： 针对列表第一列有checkout 或者 序号的 可以通过evt.oldIndex - 1 解决
          const oldItem = this.dropCol[evt.oldIndex - 1]
          // console.log('111', oldItem)
          this.dropCol.splice(evt.oldIndex - 1, 1)
          this.dropCol.splice(evt.newIndex - 1, 0, oldItem)
        }
      })
    }
  }
}
</script>

<style lang="less" scoped>

</style>
